Illuminating apparatus for photographic copy boards



May, 1925.

W. W. AYRES ILLUMINATING APPARATUS FOR HOTOGRAPHIC COPY BOARDS 2Sheets-Sheet 1 Filed April l, 1922 .Ullllfnllq lulllV llllll! 1 llllll ll ----Il.. J

lNVENToR. Webb M lyre@ ATTO BY lf May 5, 192s.- -1-,536555 w.l w. AYREsILLUMINATING APPARATUS vFOR PHOTOGRAPHIG cQPY oAnDs 4 Filed April 1,1922 2, Sheets-Sheet 2 /llllllllllll A \\\\\\\\\\\\\\\\\?A INVENTOR.Webb h( aVl/res BY s W Patented May 5, 1925.

UNITED STATES PATENT OFFICE.

WEBB W. .AYRES, F PAVILION, NEW YORK, ASSIGNOR OF THREE-EIGHTHS T0 RICH-ARD WALKER VJHITE ROCHESTER, NEW YORK.

AND TXVO-'EIGHTHS TO AMBROSE A. MERRY, BOTH OF ILLUMINATING APPARATUSFOR PHOTOGRAPHIC COPY BOARDS.

Application filed April 1,

T 0 all whom it may concern.'

Be it known that I, IVEBB IV. Avans, a citizen of the United States ofAmerica, residing at Pavilion, in the county of Genesee and State of NewYork, have invented certain new and useful Improvements iu IlluminatingApparatus for Photographic Copy Boards, of which the following is aspecication.

The object of this invention is to provide an improved illuminatingapparatus for illuminating objects on a photographic copy purpose ofmaking a photoboard for the graphic copy thereof.

This andr other objects of this invention will be fully illustrated inthe drawing, described in the specification and pointed out in theclaims at the end thereof.

In the accompanying drawing:

Figure l is a side elevation of the apparatus showing its application toa photographic copying machine, the photographic copying machine beingshown in dotted lines in the figure.

Figure 2 is a top plan View of the cop` ing board vof the machine withthe illuminating apparatus attached thereto.

igure 3 is a vertical sectional view of one of the reflectors used forthe illuminating apparatus.

Figure 4 is a vertical sectional view of a corner of a copy board withone of the adjustable brackets for supporting one of the reflectors ofthe apparatus, the reflect-or shown being a modification of the'typeillustrated in Figures l lto 3 inclusive.

Figure 5 is a side elevation of the parts of the apparat-us illustratedin section in Figure 4.

In the several figures of the drawing, like reference numerals indicatelike parts.

My present invention is an improvement 'over the apparatus illustratedin my prior vapplication No. 343,359 filed December 8, 45'1919. Asillustrated in, the drawings vthe apparatus comprises 'the reflectors l,2, 3 'and 4, each of which is mounted on a horllow standard 5. Thereflectors illustrated are of the parabolic type and are made 50preferably of metal with a light diffusing coating provided on theinside thereof which coating has a rough surface. These reectors have'a` metal bracket 6 fastened to one side thereof which is made of a1922. Serial No. 548,595.

metal band bent to form an angular base i to which the standard 5 isattached. For this purpose the upper end of the standard is bentoutwardly at an angle thereto parallel to the angular base of thebracket- 6. In this way the reflectorsare supported at the top of thestandards 5 preferably at an angle of about degrees to the copy board 7.

Each lof the standards is formed of a tubing which telescopes on avertical guide S. This guide forms part of an angular bracket 9 of whichthe horizontal section or guide 10 extends into a support ll fastened tothe under side of each of the corners ofl the copy board 7. The supports11 are made up of a small vertical rectangular metal frame having a pairof rectangular holes 12 therein, one in each of the vertical sections ofthe frame Il and in line with each other. The horizontal guide l0 of theangular bracket 9 is rectangular in section and is mounted to slide inthe opening 12, l2 in each of the supports ll so that the rellectors canbe moved toward or away from the center of the copy board 7. Mounted inthe support l1 between the section l0 of the bracket 9 and the inside ofthe frame is a leaf spring 13. This spring presses yieldingly againstthe under side of the section l0 for the purpose of increasing thefrictional contact of the bracket 9 with the support 1].. The bracketis, therefore. always rmly held in place on the support withoutimpairing the adjustability of the bracket. The spring 13 also preventschattering when bracket 9 is drawn out.

As illustrated in Figure 2, the supports ll and in turn the reflectors lto 4 inclusive are mounted at diagonally opposite points on the copyboard 7 at equal distances from the center thereof. The reflectors arepointed to the center of the copy board and are adjustable horizontallyas well as vertically so that this holds true no matter how far from thecenter of the copy board the reflectors have to be grou ed in order toproperly illuminate the subjectto be copied.

The horizontal adjustment of the reflectors is secured by sliding thehorizontal guide 10 ofthe angular bracket 9 in or out of the supportyl1. l The frictional contact which the angular bracket makes with the ament` must be made.

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support 11 as above pointed out is sufficient to hold the reflectorssteady at any distance from the center of the board. Whenever thereflectors 4are adjusted horizontally on the vboard a correspondingvertical adjust- This is secured by raising the hollow standard on thevertical guide 8 of the' angular bracket 9 and then 'fastening it in thedesired elevation on the guidek by means of the set screw 14 providednear the lower end of each of the hollow standards. j j

ln order to secure vthe proper vertical adjustrnenfi with aAcorresponding horizontal adjustment each of the horizontal guides 10 andthe vertical.. `guides 48 forming the bracket 9 isfprovided with aseries of notches 15 and 16 respectively7 indicating the corre-f.

sponding vertical position of the reflector to a given horizontalpositionl thereof.' Thus when the horizontal guide 10 isV pulled out ofthe support 11 to the first of the notches 15, the standard 5 must becorrespondingly raised on the vertical guide 8 to the first of thenotches 16 thereon.

As will beseen from an inspection of the to the To` do this thereflectors illustrated in Figures 1 to 3v inclusive are provided withthe bracket forming a suitable base to which the standard may befastened. Y

InFigures l and 5 'I have illustrated cone shaped refiectorl'. Thisreflector has the standards 5 directly fastened to lthe outside of itabout midway thereof to hold the reflector in the proper angularposition with regard to the copy board as above pointed out.

Both the parabolic reflectors as well as the conical reflectors whenused in connection with this apparatus are provided with a lightdiffusing and reflecting surface. This is securedby coating thereflecting surface of the reflectors with an aluminum paint or itsequivalent giving the reflectors a rough light diffusing surface whichbreaks -up the light rays absorbing some of them so that only certainlight rays are reflected onto the copy board. As pointed out in my priorvapplication above referred to, this gives the desired result in thatitsecures an illumination` for the copy board which in efiicienc'y andresults excels tliemercury vapor lamp heretofore used for this purpose.It will be seen that both the conical and parabolic reflectors aremounted so that they project over the board when in their innermostposition. This puts them in better position for copying small papers.

The copy board may be made to rotate on the pivot 'pin 18 with relationto the position vof the reflectors so that the light reflected.

from the reflectors. can be shifted on the copy board according to thesubject to be illuminated thereon.

I claim: I

1. In anv apparatus for illuminatingY ay ihotographic copy board, thecombination of a series of reflectorsgrouped at equal distances from thecenter of the copy board on all sides or corners thereof at apredetermined angle thereto, a support for each of said reflectorsmounted on the under side of the copy board, an angle bracket mounted tohorizontally slide in and out of each of said supports and projectingabove said copy .said reflectors on the vertical guide of said anglebracket-s and means provided on the "horizontal guide and vertical guideof said angle bracket to enable a vertical adjust-- ment of thereflect-ors to a givenhorizontal adjustment of said angle brackets.

2. In an illuminating apparatus foil photographic copy boards, thecombination of a series of reflectors grouped around the copy board atequal distances from the center thereof, a rect-angular frame forming asupport mounted on the under side of the copy board foreach ofsaidreflectors, said frame having a pair of openings provided l thereinin a horizontal line with each other,

an angular bracket mounted to slide in the*` holes provided in saidrectangular frame, a

spring interposed. between the angular bracket and the rectangularfra-meto firmly hold said angular bracket in said rectangular frame,adjustable means interposed bejtween said angular brackets and saidreflectors to support said reflectors angularly to' said copy board,said reflectorsbeing adapted to overhang said copy board or be movedaway from it through the adjustment j of said angular bracketv insaidrectangular frame.

3. In an apparatus for illuminating a photographic copy board, thecombination of a series of reflectors grouped at equal distances fromthe center of the copy board, a standard fastened to the outside of eachof said reflectors, an angular bracket mounted on the copy board, meansadapted to horizontally adjust said angular bracket yon the under sideof said copy board, said stand- :ards being mounted to telescopev on.`said angular bracket to vertically Vadjust said standards on saidangular bracket, means for rotating said copy board with relation' i tosaid reflectors. Y

In testimony whereof I affix my signature.

- W. Av RES.

